Valve-refacing machine



May 29, 1923. 1,456,807

' H. G. LARSEN ET AL VALVE REFACING MACHINE Filed Oct. 12 1921 2 Shets-Sheet 1 Jo I 1! I h 9 2 9 W a P w M M m e A. 7 s w N w a m J F5 v M y a H m H. G. LARSE'N ET AL VALVE REFACING MACHINE Filed Oct. 12

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Patented May 29, 1923.

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HANS G. LARSEN AND WILLIAM C. REDFIELD, OF CHICAGC, ILLINOIS;

VALVE-REFACING MACHINE.

Application filed October 12, 1921. Serial No. 507,373.

To all whom 2'25 may concern:

Be it known that we, HANS G. LARSEN and VILLIAM C. REDFIELD, citizens of the United States of America, and residents of Chicago,

5 in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Valve-Refacing Machines, of

which the following is a specification.

This invention relates to machines or appliances for refacing the worn seat or face of the poppet valve heads of gas engines and the like, and has for its various objects 2-- To provide a simple and efficient structural formation and combination of parts and mechanisms by means of which a poppet valve head is revolubly supported in proper position for manual axial rotation, and the turning tool or cutter is fed obliquely across the face or seat of the valve head in an automatic manner and in unison with the rotation of the valve head upon its axis.

To provide a durable and effective com bination of parts adapted to attain an intermittent feed of the tool carriage and the tool carried thereon, in an automatic manner in unison with the revolution of the piece of work operated on.

To provide a formation and association of parts and mechanisms whereby poppet valve heads of different sizes are successively held in position and properly centered in a rapid, accurate and convenient manner, all as will hereinafter more fully appear.

In the accompanying drawings Fig. 1, is a top view of a machine embodying the present improvements,

Fi is a longitudinal section on line z:- -a 22, Fig. 1.

Fig. 3, is a transverse section on line 33, Fig.2. 7

Fig. 4, is a detail section on line 4+4, Fig. 1.

Fig. 5, is adetail perspective view of the floating center of the present improvement.

Like reference numerals indicate like parts inthe severa-lviews.

Referring to the drawings, 1 designates the supporting frame of the machine, of an usual and suitable construction,preferably comprising a base plate having upwardly eX- tending posts and blocks as follows 2 designatesa plurality of saddle blocks arranged in longitudinal spaced relation on said bed plate and havingVshaped channel-s2 in. their top faces adapted to receive and,

center the stem or rod 3 of avalve head 3 to be refaced. 1 v

4- designates a fulcrum post arran ed to one side and midway the'saddle brac lrets 2 for the support ofthe movable confining plate hereinafter described.

5 designates a journal post arranged in longitudinal alignment with the saddle a flat resistance bar socketed at its lower end in a recess in the base or frame 1 between the journal'block 5 and an adjacent saddle block 2 and having a spring 9 by which it is resiliently forced away from said saddle block. At its upper end the bar 8 is of a forked formation adaptedto straddle the valve, stem 3 of a valve memberand having bearing engagement against the under surface of the valve head 3 thereof.

10 designates the work adjusting spindle formed with a screw threaded shank engaging in the screw threaded bore of the journal block 5 andhaving at its'rear end an operating hand wheel 10", asshown; The spindle 10 is disposed in longitudinal alignment with the V shaped holding channels of the saddle posts 2and confining plate 6, with its forward end having adjusting engagement through the hereinafter described floating center, with the upper surface of the valve head '3 to move the same longitudinally againstthestress of the resistance bar 8 and its spring 9, in efiectinga feed of the valve head to the turning or cutting tool hereinafter described. 1' a I 11 designates a transversely arranged can rier plate pivoted at its outer end on the frame or base 1 and carrying atits inner and free end a. conecenter '12 adapted to engage in the usual centering recess-of a valve head 3 regardlessofvthe size of said head and form a bearing center therefor in the refacing operation of the machine. The floating nature of the carrier plate 11 readily admits of a movement in a vertical plane to correspond with the vertical height of any ordinary sizes of valve heads 3 which are to be refaced, and without said carrier plate moving out of engagement with-the end of the adjusting spindle 1O aforesaid; Q

13 designates a hand crank, the hub por-. tion of which is adapted for fixed engagement with the stem 3' of a valve head to be refaced, and preferably by means of a plurality of split bushings 14: fitting an orifice in said hub and having orifices of diameters corresponding with the different diameters of valve stems generally used.

1 1 designates a clamping screw adapted to clamp a bushing 14 when in place in the hub of the hand crank 13, upon the valve stem.

15 and 15 designate two orifices formed in the arm of the hand crank 13 for the reception of a wiper pin or stud 16 adapted for operative engagement with the tool carriage adjusting mechanism now to be de scribed.

17 designates the base plate of the tool carriage formed with the usual guides for the hereinafter described slide rest. The base plate 17 is pivoted near its inner end to the main frame 1 by a pivot stud or the like, and has at its other and outer end a segmental flange and clamping screw 18 by which it may be set in an angular direction corresponding with the angle or taper of the seat portion of the valve head 3.

19 designates the slide rest moving on the base plate 17 and having a tool post 20 for holding a turning or cutting tool 2-1, the point of which is set to take a cut across the seat portion or face of the valve head 3.

22 designates a revoluble feed sleeve journalled in an oscillatory manner on the frame or base 1', and preferably on a lateral extension of one of the saddle blocks 2 aforesaid. Said sleeve 2-2 has an elongated tu bular inner portion, the bore of which is screw threaded for operative engagement with a screw threaded portion of an aligned rod 23 which extends to and is pivotally connected to the slide rest 17 aforesaid. At its outer end the feed sleeve carries a star wheel 24 arrangedin the path of the aforesaid wiper pin 16 of the hand crank 13, so as to receive a partial intermittent rotation on each revolution of said hand crank. With said wiper pin 16 in the inner orifice '15 aforesaid movement in one direc. tion is imparted to the star wheel 24:, and with saidpin 16 in the outer orifice 15 aforesaid, said star wheel 24 will receive motion in an opposite or reverse direction.

In the operation of the machine, the valve member is arranged and adjusted to the proper position on the saddle blocks 2, and the hand crank 13 fixedly secured on the stem 3 of the valve member so as to effect a manual rotation of the same. With each revolution of the hand crank 13, a partial rotation is imparted to the star wheel 24 in one direction or the other, to impart an intermittent feed to the turning tool 24 across the seat face of the valve head'3 to effect the gradual refacing of the same. Such feed is attained by the above described operative connections between the revoluble sleeve star wheel 24 and rod 23.

Having thus fully described our invention, whatwe claim as new and desire to secure by Letters Patent, is

1. In a valve refacing machine, a frame,

a saddle block formed with an angular chaunel, a confin ng" plate in superimposed relation to said saddle block, means for adjustlng sald plate, a work ad usting spindle mounted on the frame in aligned relation to the channel of the saddle block, a. resistance,

bar arranged in opposed relation to said adjusting spindle, resilient means for moving said bar in one direction, a slide rest carrying a cutting tool and having a sliding movement in an inclined direction on the frame, an operating hand crank. and

means intermediate of said hand crank and the slide rest for imparting an intermittent feed to said slide rest with each revolution of the hand crank.

2. In a valve rcfacing machine, a frame, a

mounted on the frame in aligned relation to i the channel of the saddle block, a resistance bar arranged in opposed ,relation to said adjusting spindle, resilient means for 1noving said bar in one direction, a floating center arranged at the forward end of said spindle, a slide rest carrying a cutt ingtool and having sliding movement in an inclined direction on the frame, an operating hand crank, and means intermediate of said hand crank and the slide rest for imparting an intermittent feed to said slide rest witheach revolution of the hand crank.

3. In a. valve refacing machine, a frame, a

saddle block formed withan angular channel, a confining plate in super-imposed relation to said saddle block, means for adjust; ing said plate, a work adjusting spindle mounted on the frame in aligned relationto the channel of the saddle block, a resistance bar arranged in'opposed relation tosaid adjusting spindle, resilient means for moving saidbar'in one direction, a floating center arranged at the forward end of said spindle and having a carrier plate pivoted on the frame, a slide rest carrying a cutting tool and-havingsliding movement in an inclined direction on the frame, an operating hand crank, and means intermediate of said hand crank and the slide rest forimparting an in termittent feed to the slide rest with. each revolution of the hand crank.

l. In a valve refacing machine, a frame, a saddle block formed with an angular channel, a confining plate in super-imposed relation to said saddle block, means for adj usting said plate, a work adjusting spindle mounted on the frame in aligned relation to the channel of the saddle block, a resistance bar arranged. in opposed relation to said adjusting spindle, resilient means for moving said bar in one direction, a slide rest carrying a cutting tool and having a sliding movement in an inclined direction on the frame, an operating hand crank, and means' intermediate of-said hand crank and the slide rest for imparting an intermittent feed to said slide rest with each revolution of the hand crank, the same comprising a. tubular sleeve revoluloly mounted on the frame and having a screw threaded bore, a star wheel mounted on said sleeve, a rod connected to the slide rest and having a screw threaded portion engaging the bore of said sleeve, the hand crank having a wiper pin adapted to engage the star wheel and impart intermittent rotation thereto.

5. In a valve refacing machine, a frame, a

saddle block formed with an angular chan nel, a confining plate in super-imposed relation to said saddle'block, means for adjusting said plate. a. work adjusting spindle mounted on the frame in aligned relation to the channel of the saddlehlock, a resistance bar arranged in the opposed relation to said adjusting spindle, resilient means fornioving said bar in one direction, a floating center arranged at the forward end ofsaid spindle. a slide rest carrying a cutting tool and having sliding movement in an inclined direction on the frame, an operating hand crank, and means intermediate of said hand crank and the slide rest for imparting an intermittentfeed to the slide rest with eachrevolution of the hand crank, the same com prising a tubular sleeve revoluloly mounted on the frame and having a screw threaded bore. astar wheel mounted .on said sleeve, arod connected to the slide rest and having a screw threaded portion engaging the bore of said sleeve, the hand crank having a pin or stud adapted to engage the star wheel and impart intermittent rotation thereto.

6. In a valve refacing machine, a frame, a saddle block formed with an angular channel, a confining plate in super-imposed relation to said saddlerhlock, means for adjusting said plate, a work adjusting spindle mounted on the frame in aligned relation to the channel of the saddle block, a resistance harloosely attached at one end on the frame and having a forked end in opposed relation to the adjusting spindle, resilient means for moving said bar in one direction, a slide rest carrying a cutting tool and having sliding movement in an inclined direction on the frame, an operating hand crank, and means intermediate of said hand crank and the slide rest for imparting an intermittent feed to the slide rest with each revolution of the hand crank. v i

7'. In a valve refacing machine,'a frame, a, saddle hlock formed with an angular channel, a confining platein super-imposed relation to said saddle block, means foradjusting said plate, a work adjusting spindle mounted on' the framein" aligned relation to the channel of the saddle block, av resistance bar loosely attached at one end on the frame and having a forkedjend inopposed relation to the adjusting spindle, resilient means for moving said bar in one direction," a floating spindle, resilient means for moving saidloar in one direction, a floating center arranged.

at the forward endof said spindle, a slide ing movement in an inclined direction on the intermediate of said hand crank and the slide rest for imparting an intermittent feed to the slide rest with each revolutionv of the hand crank. 4

8. In a valverefacingmachine, a frame, a pair of saddle blocks formed with angular channels in their top surfaces, a. confining plate fulcrumed at one side on the frame with'the other side in superimposed relation to the saddle blocks, an adjusting screw en'- gaging said confin'ing plate, a work adjusting spindle mounted on the frame in alignedv relation to the channels of the saddle blocks, a resistance bar arranged in opposed relation to said adjusting spindle, resilient means for moving said bar in one direction,

a slide rest carrying a cutting tool and hav- 1 rest carrying a cutting tool and having slidv pair of saddle blocks formed with angular I channels in their top surfaces, a confining plate fulcrumedat one sideon the frame with the other side in super-imposed relation to the saddle blocks, an adjusting screw engaging said confining plate, a work adjusting spindle mounted on the frame in aligned relation to the channels of the saddle blocks,

a resistance bar arranged in opposedrelation to said adjusting spindle, resilient means for moving said bar in one direction, a slidev rest carrying a cuttlng tool and having sliding movement in an inclineddirection on the frame, an operating hand crank, and means intermediate of said hand crank. and the slide rest for imparting to said slide rest with each revolution of the hand crank,

an intermittent feed ,1 not said sleeve, the hand crank having wipe the same comprising a tubular sleeve revoluhly mounted on the frame and having a screw threaded bore, a star wheel mounted on said sleeve, a rod connected to the slide rest and having a screw threaded portion engaging the here of said sleeve, the hand crank having a wiper pin adapted to en gage the star Wheel mounted on said sleeve, a rod connected to the slide rest and having a screw threaded portion engaging the he pin adapted to engage the wheel and impart intermittent rotation thereto,

10. ln a valve refacing machine, a frame.

' a saddle block formed with an angular channel, a confining plate in super-in'iposed relation to said saddle block, means for ad ustmg said plate, a work adjusting spindle mounted on the frame in aligned relation to the channel of the saddle block, a resistance har arranged in opposed relation to said adjusting spindle, resilient means for moving said bar in one direction, a slide rest carrying a cutting tool and having a sliding movement in an inclined direction on the frame, an operating hand crank having an arm, a wiper pin adjustable to and irom the center of the crank arm, and means intermediate oi said hand crank and slide rest for imparting an intermittent feed to the slide rest with each at the forward end of said spindle, a slide rest carrying a cutting tool and haviitig sliding movement in an inclined direction on the frame,'an operating hand crank havingan arm, a Wiper pin adjustable to and from the center of the crank arm, and means intermediate of said hand crank and slide rest for imparting an intermittent feed to the slide rest with each revolution of the hand crank, said means having a star wheel disposed in the path of the wiper pin aforesaid.

12. In a valve retacing machine, a frame, a pair of saddle blocks formed with angular channels in their top suriaces, a confining plate tulcrumed at one side on the frame with the other side in superimposed relation to the. saddle blocks, an adjusting screw engaging said confining plate, a Work adjusting spindle mounted on the frame in aligned relation to the channels of the saddle blocks, a resistance bar arranged in opposed relation to said adjusting spindle, resilient means for moving said bar in one direction,

a slide rest carrying a cutting tool and having sliding movement in an inclined direction on the frame, an operating hand crank, and means intermediate of said hand crank and the slide rest for imparting an intermittent feed to said slide rest with each revolution of the hand crank, the same comprising a tubular sleeve revolubly mounted on the frame and having a screw threaded bore, a star wheel mounted on said sleeve, a rod mounted to the slide rest and having a screw threaded portion engagin the bore of said sleeve, the hand crank having a Wiper pin adapted to engage the star Wheel and impart intermittent rotation thereto.

Signed at Chicago, Illinois,this 6th day of October, 1921.

HANS G. LARSEN. WILLIAM QREDFIELD. 

